Suzanne Humphries didn’t just turn anti-vaxx, she renounced medicine altogether and became a homeopath. Which means any sane person would run far away from her. Ironically the whole basis of homeopathy is the (ridiculous) idea that you can cure diseases by giving the patient a very tiny (really non-existent) amount of the very thing that (allegedly) causes that disease. In other words, vaccination.
I’d bet, though, that she makes far more money today than she did as a real doctor.